My Oracle Support Banner

LogViewer throws exception instead of displaying logs (Doc ID 1465747.1)

Last updated on MAY 04, 2021

Applies to:

Oracle WebCenter Sites - Version 7.6.0 to [Release FatWire]
Information in this document applies to any platform.


When trying to read the log files using the System Tools' Log Viewer from the Admin tab, the following exception is thrown in the application server log:

 SEVERE: Servlet.service() for servlet jsp threw exception Underflow for position: -1
        at com.fatwire.cs.systemtools.util.FileUtil.getLineNumber(
        at com.fatwire.cs.systemtools.util.FileUtil.countLines(
        at com.fatwire.cs.systemtools.util.FileUtil.countLines(
        at com.fatwire.cs.systemtools.logs.processor.LogMetadata$FileInfoEntry.<init>(


To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.